Malware Analysis Report

2025-08-10 22:11

Sample ID 231011-skv9lseh9x
Target 4fb330b2b5620e1b30a795ad5d989526d7cefbcb553d4a79227b1220351d25bd
SHA256 4fb330b2b5620e1b30a795ad5d989526d7cefbcb553d4a79227b1220351d25bd
Tags
formbook 4hc5 rat spyware stealer trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

4fb330b2b5620e1b30a795ad5d989526d7cefbcb553d4a79227b1220351d25bd

Threat Level: Known bad

The file 4fb330b2b5620e1b30a795ad5d989526d7cefbcb553d4a79227b1220351d25bd was found to be: Known bad.

Malicious Activity Summary

formbook 4hc5 rat spyware stealer trojan

Formbook

Formbook payload

Suspicious use of SetThreadContext

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2023-10-11 15:11

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-10-11 15:11

Reported

2023-10-12 05:07

Platform

win7-20230831-en

Max time kernel

118s

Max time network

130s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4fb330b2b5620e1b30a795ad5d989526d7cefbcb553d4a79227b1220351d25bd.exe"

Signatures

Formbook

trojan spyware stealer formbook

Formbook payload

rat
Description Indicator Process Target
N/A N/A N/A N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\4fb330b2b5620e1b30a795ad5d989526d7cefbcb553d4a79227b1220351d25bd.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2996 wrote to memory of 2680 N/A C:\Users\Admin\AppData\Local\Temp\4fb330b2b5620e1b30a795ad5d989526d7cefbcb553d4a79227b1220351d25bd.exe C:\Users\Admin\AppData\Local\Temp\4fb330b2b5620e1b30a795ad5d989526d7cefbcb553d4a79227b1220351d25bd.exe
PID 2996 wrote to memory of 2680 N/A C:\Users\Admin\AppData\Local\Temp\4fb330b2b5620e1b30a795ad5d989526d7cefbcb553d4a79227b1220351d25bd.exe C:\Users\Admin\AppData\Local\Temp\4fb330b2b5620e1b30a795ad5d989526d7cefbcb553d4a79227b1220351d25bd.exe
PID 2996 wrote to memory of 2680 N/A C:\Users\Admin\AppData\Local\Temp\4fb330b2b5620e1b30a795ad5d989526d7cefbcb553d4a79227b1220351d25bd.exe C:\Users\Admin\AppData\Local\Temp\4fb330b2b5620e1b30a795ad5d989526d7cefbcb553d4a79227b1220351d25bd.exe
PID 2996 wrote to memory of 2680 N/A C:\Users\Admin\AppData\Local\Temp\4fb330b2b5620e1b30a795ad5d989526d7cefbcb553d4a79227b1220351d25bd.exe C:\Users\Admin\AppData\Local\Temp\4fb330b2b5620e1b30a795ad5d989526d7cefbcb553d4a79227b1220351d25bd.exe
PID 2996 wrote to memory of 2680 N/A C:\Users\Admin\AppData\Local\Temp\4fb330b2b5620e1b30a795ad5d989526d7cefbcb553d4a79227b1220351d25bd.exe C:\Users\Admin\AppData\Local\Temp\4fb330b2b5620e1b30a795ad5d989526d7cefbcb553d4a79227b1220351d25bd.exe
PID 2996 wrote to memory of 2680 N/A C:\Users\Admin\AppData\Local\Temp\4fb330b2b5620e1b30a795ad5d989526d7cefbcb553d4a79227b1220351d25bd.exe C:\Users\Admin\AppData\Local\Temp\4fb330b2b5620e1b30a795ad5d989526d7cefbcb553d4a79227b1220351d25bd.exe
PID 2996 wrote to memory of 2680 N/A C:\Users\Admin\AppData\Local\Temp\4fb330b2b5620e1b30a795ad5d989526d7cefbcb553d4a79227b1220351d25bd.exe C:\Users\Admin\AppData\Local\Temp\4fb330b2b5620e1b30a795ad5d989526d7cefbcb553d4a79227b1220351d25bd.exe

Processes

C:\Users\Admin\AppData\Local\Temp\4fb330b2b5620e1b30a795ad5d989526d7cefbcb553d4a79227b1220351d25bd.exe

"C:\Users\Admin\AppData\Local\Temp\4fb330b2b5620e1b30a795ad5d989526d7cefbcb553d4a79227b1220351d25bd.exe"

C:\Users\Admin\AppData\Local\Temp\4fb330b2b5620e1b30a795ad5d989526d7cefbcb553d4a79227b1220351d25bd.exe

"C:\Users\Admin\AppData\Local\Temp\4fb330b2b5620e1b30a795ad5d989526d7cefbcb553d4a79227b1220351d25bd.exe"

Network

N/A

Files

memory/2996-0-0x0000000074440000-0x0000000074B2E000-memory.dmp

memory/2996-1-0x0000000000240000-0x00000000002D4000-memory.dmp

memory/2996-2-0x0000000004B80000-0x0000000004BC0000-memory.dmp

memory/2996-3-0x0000000074440000-0x0000000074B2E000-memory.dmp

memory/2996-4-0x0000000004B80000-0x0000000004BC0000-memory.dmp

memory/2996-5-0x0000000000390000-0x00000000003A4000-memory.dmp

memory/2996-6-0x00000000003C0000-0x00000000003CC000-memory.dmp

memory/2996-7-0x00000000050D0000-0x000000000513E000-memory.dmp

memory/2680-8-0x0000000000400000-0x000000000042F000-memory.dmp

memory/2680-10-0x0000000000400000-0x000000000042F000-memory.dmp

memory/2680-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2680-14-0x0000000000400000-0x000000000042F000-memory.dmp

memory/2996-15-0x0000000074440000-0x0000000074B2E000-memory.dmp

memory/2680-16-0x0000000000870000-0x0000000000B73000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-10-11 15:11

Reported

2023-10-12 05:10

Platform

win10v2004-20230915-en

Max time kernel

207s

Max time network

225s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4fb330b2b5620e1b30a795ad5d989526d7cefbcb553d4a79227b1220351d25bd.exe"

Signatures

N/A

Processes

C:\Users\Admin\AppData\Local\Temp\4fb330b2b5620e1b30a795ad5d989526d7cefbcb553d4a79227b1220351d25bd.exe

"C:\Users\Admin\AppData\Local\Temp\4fb330b2b5620e1b30a795ad5d989526d7cefbcb553d4a79227b1220351d25bd.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 240.81.21.72.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 1.202.248.87.in-addr.arpa udp
US 8.8.8.8:53 208.194.73.20.in-addr.arpa udp
US 8.8.8.8:53 136.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 1.202.248.87.in-addr.arpa udp
US 8.8.8.8:53 10.179.89.13.in-addr.arpa udp
US 8.8.8.8:53 73.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp

Files

memory/4948-1-0x0000000074C90000-0x0000000075440000-memory.dmp

memory/4948-0-0x0000000000E40000-0x0000000000ED4000-memory.dmp

memory/4948-2-0x0000000005EA0000-0x0000000006444000-memory.dmp

memory/4948-3-0x00000000057E0000-0x0000000005872000-memory.dmp

memory/4948-4-0x0000000005A50000-0x0000000005A60000-memory.dmp

memory/4948-5-0x0000000074C90000-0x0000000075440000-memory.dmp

memory/4948-6-0x0000000005A50000-0x0000000005A60000-memory.dmp

memory/4948-7-0x0000000005790000-0x000000000579A000-memory.dmp

memory/4948-8-0x0000000000FC0000-0x0000000000FD4000-memory.dmp